Steam condensate water discharging device of high-tower granulation kiln

Abstract

A steam condensate water discharging device of a high-tower granulation kiln comprises a steam coil pipe, the outlet end of the lower side of the steam coil pipe is connected with a horizontally-arranged flow dividing pipe, the flow dividing pipe is connected with a plurality of drainage branches in parallel, each drainage branch is provided with an electrically-controlled first throttling valve, the rear side of each first throttling valve is connected with a drainage valve, and the drainage valve is connected with a water outlet of the steam coil pipe. An electrically-controlled second throttling valve is arranged on each steam trap gas circuit loop, the tail end of each second throttling valve is merged into a steam backflow pipe and flows into the next station, condensate water loops of all the steam traps are converged and then connected with a condensate water collecting station through an electronic flowmeter, and an electronic bypass valve is further arranged between the flow dividing pipe and the steam backflow pipe. An external power supply controller is arranged beside the shunt pipe; and the first throttle valves, the second throttle valves, the electronic bypass valves and the electronic flow meters on all the drainage branches are electrically connected with the power supply controller. The drain valve can be reasonably configured according to the actual flow of condensate water, so that the condensate water can be discharged in time, and steam loss can be reduced.

Description

Technical Field

[0001] The utility model relates to a steam condensate discharge device for a high-tower granulation kiln. Background Art

[0002] The mixing tank in a high-rise granulation kiln typically features a steam coil heating device. Heating the material produces condensate, which in turn becomes damp and corrosive. As the condensate builds, the high-velocity steam provides a sufficient "water head," creating a high-energy "water bomb" or water hammer. Water hammer can cause a range of damage to the steam system, potentially deforming or damaging pipes, valves, elbows, flanges, instrumentation, and heat exchange equipment. In severe cases, this can lead to safety incidents. To prevent this, a steam trap is typically installed at the lower outlet of the steam coil. This trap separates the steam and condensate, protecting the system piping. The existing steam trap structure is described in Chinese Patent CN2204912Y. This trap, connected to the steam pipeline, allows for the timely removal of condensate. However, in actual use, the amount and temperature of materials in the mixing tank are different, resulting in different amounts of condensate at the end of the steam pipeline. The drainage capacity of the existing steam trap is within a fixed range. When the amount of condensate is too little, the float of the large-capacity steam trap moves frequently, causing greater wear and tear, and causing steam leakage. When the amount of condensate is too large, the steam trap cannot discharge a large amount of condensate in time. When the bypass valve is opened, the condensate will enter the steam return pipe along with the steam, causing damage to the system pipeline. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a steam condensate discharge device for a high tower granulation kiln, which can reasonably configure the steam trap according to the actual flow of the condensate, thereby not only discharging the condensate in time but also reducing the steam loss.

[0004] In order to solve the above technical problems, the utility model provides a steam condensate discharge device for a high-tower granulation kiln, comprising a steam coil, a horizontally arranged diverter pipe connected to the lower outlet end of the steam coil, a plurality of drain branches connected in parallel on the diverter pipe, each drain branch is provided with an electrically controlled first throttle valve, a drain valve is connected to the rear side of the first throttle valve on each drain branch, an electrically controlled second throttle valve is provided on the drain valve air circuit of each drain branch, the end of the second throttle valve on each drain branch is merged into the steam return pipe and flows into the next station, the condensate circuit of the drain valve on each drain branch is converged and connected to the condensate collection station through an electronic flow meter, an electronic bypass valve is further provided between the diverter pipe and the steam return pipe, an external power supply controller is provided next to the diverter pipe, and the first throttle valve, the second throttle valve, the electronic bypass valve and the electronic flow meter on all drain branches are electrically connected to the power supply controller.

[0005] For the purpose of simple explanation, the steam condensate discharge device for a high tower granulation kiln described in the present invention is referred to as the device below.

[0006] The working principle and advantages of this device are as follows: The steam traps on each drain branch in this device are small-capacity steam traps. Initially, only the first and second throttle valves on one drain branch are open, that is, only one steam trap is connected to the system. If the electronic bypass valve is activated, it indicates that there is too much condensate. The signal is fed back to the power controller, and the power controller then controls the first and second throttle valves on the second drain branch to open. At this time, the two parallel steam traps discharge condensate simultaneously. If the bypass valve still does not close after a certain period of time, the power controller controls the first and second throttle valves on the third drain branch to open, and so on, until the bypass valve is closed. At this time, all the steam traps connected to the system reach a balanced state with the condensate flow. When the electronic flow meter value decreases by a certain amount, the power controller controls the closure of the current drain branch, so that the steam traps connected to the system and the condensate flow are technically balanced. If the flow rate of the electronic flow meter continues to decrease, the drain branch will continue to be closed until it returns to the initial state, always maintaining a balanced state between the steam traps connected to the system and the condensate flow. By properly configuring the steam trap according to the actual flow rate of condensate, the condensate can be discharged in a timely manner, steam loss can be reduced, and wear of the steam trap can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural diagram of this device. DETAILED DESCRIPTION

[0008] See also Figure 1 A steam condensate discharge device for a high tower granulation kiln includes a steam coil 1. The lower outlet end of the steam coil 1 is connected to a horizontally arranged diverter pipe 2. A plurality of drain branches 3 are connected in parallel to the diverter pipe 2. Each drain branch 3 is provided with an electrically controlled first throttle valve 31. The rear side of the first throttle valve 31 on each drain branch 3 is connected to a drain valve 32. The gas circuit of the drain valve 32 on each drain branch 3 is provided with an electrically controlled second throttle valve 33. The end of the second throttle valve 33 on each drain branch 3 is merged into a steam return pipe 6 and flows into the next workstation 7. Each The condensate circuit of the drain valve 32 on the drain branch 3 is converged and connected to the condensate collection station 5 through the electronic flowmeter 4. An electronic bypass valve is also provided between the diversion pipe 2 and the steam return pipe 6. An external power supply controller is provided next to the diversion pipe 2. The first throttle valve 31, the second throttle valve 33, the electronic bypass valve and the electronic flowmeter 4 on all the drain branches 3 are electrically connected to the power supply controller (the power supply controller in the utility model is an existing mature technology and can be purchased from outside. For the sake of simple explanation, the power supply controller body and the electrical connection lines are not shown in the drawings).

[0009] The working principle and advantages of this device: The drain valve 32 on each drain branch 3 in this device adopts a small-capacity drain valve 32. In the initial state, only the first throttle valve 31 and the second throttle valve 33 on one drain branch 3 are opened, that is, only one drain valve 32 is connected to the system. If the electronic bypass valve is started, it means that there is too much condensed water. The signal is fed back to the power controller. At this time, the power controller will control the first throttle valve 31 and the second throttle valve 33 on the second drain branch 3 to open. At this time, the two parallel drain valves 32 discharge condensed water at the same time. If the bypass valve is still not closed after waiting for a certain period of time, then The power controller will control the opening of the first throttle valve 31 and the second throttle valve 33 on the third drain branch 3, and so on, until the bypass valve closes. At this point, all drain valves 32 connected to the system reach a state of equilibrium with the condensate flow. When the value of the electronic flow meter 4 decreases by a certain amount, the power controller will control the closing of the current drain branch 3, so that the drain valves 32 connected to the system and the condensate flow are technically balanced. If the flow rate of the electronic flow meter 4 continues to decrease, the drain branch 3 will continue to be closed until it returns to the initial state, always maintaining the balance between the drain valves 32 connected to the system and the condensate flow. By properly configuring the drain valves 32 according to the actual condensate flow, condensate can be discharged in a timely manner, steam loss can be reduced, and wear on the drain valves 32 can be reduced.

Claims

1. A steam condensate discharge device for a high tower granulation kiln, characterized by: It includes a steam coil, and the lower outlet end of the steam coil is connected to a horizontally arranged shunt pipe, and several drain branches are connected in parallel on the shunt pipe. Each drain branch is provided with an electrically controlled first throttle valve, and the rear side of the first throttle valve on each drain branch is connected to a drain valve. The drain valve gas circuit on each drain branch is provided with an electrically controlled second throttle valve, and the end of the second throttle valve on each drain branch is merged into the steam return pipe and flows into the next workstation. The condensate circuit of the drain valve on each drain branch is converged and connected to the condensate collection workstation through an electronic flowmeter. An electronic bypass valve is also provided between the shunt pipe and the steam return pipe, and an external power supply controller is provided next to the shunt pipe. The first throttle valve, the second throttle valve, the electronic bypass valve and the electronic flowmeter on all drain branches are electrically connected to the power supply controller.

Images